Highcharts Dynamic Charts
In this section, we will introduce you to Highcharts dynamic charts.
We have already learned about Highcharts configuration syntax in the previous sections. Now, let's look at other Highcharts configurations.
Update Chart Every Second
chart.events
Add the load method (chart load event) in the chart.event property. Generate random data points and create the chart within 1000 milliseconds.
chart: {
events: {
load: function () {
// Update the chart every second
var series = this.series[0];
setInterval(function () {
var x = (new Date()).getTime(), // current time
y = Math.random();
series.addPoint([x, y], true, true);
}, 1000);
}
}
}
Example
Filename: highcharts_dynamic_spline.htm
<html>
<head>
<meta charset="UTF-8" />
<title>Highcharts Tutorial | tutorialpro.org(tutorialpro.org)</title>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="http://code.highcharts.com/highcharts.js"></script></head>
<body>
<div id="container" style="width: 550px; height: 400px; margin: 0 auto"></div>
<script language="JavaScript">
$(document).ready(function() {
var chart = {
type: 'spline',
animation: Highcharts.svg, // don't animate in IE < IE 10.
marginRight: 10,
events: {
load: function () {
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function () {
var x = (new Date()).getTime(), // current time
y = Math.random();
series.addPoint([x, y], true, true);
}, 1000);
}
}
};
var title = {
text: 'Live random data'
};
var xAxis = {
type: 'datetime',
tickPixelInterval: 150
};
var yAxis = {
title: {
text: 'Value'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
};
var tooltip = {
formatter: function () {
return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
};
var plotOptions = {
area: {
pointStart: 1940,
marker: {
enabled: false,
symbol: 'circle',
radius: 2,
states: {
hover: {
enabled: true
}
}
}
}
};
var legend = {
enabled: false
};
var exporting = {
enabled: false
};
var series= [{
name: 'Random data',
data: (function () {
// generate an array of random data
var data = [],time = (new Date()).getTime(),i;
for (i = -19; i <= 0; i += 1) {
data.push({
x: time + i * 1000,
y: Math.random()
});
}
return data;
}())
}];
var json = {};
json.chart = chart;
json.title = title;
json.tooltip = tooltip;
json.xAxis = xAxis;
json.yAxis = yAxis;
json.legend = legend;
json.exporting = exporting;
json.series = series;
json.plotOptions = plotOptions;
Highcharts.setOptions({
global: {
useUTC: false
}
});
$('#container').highcharts(json);
});
</script>
</body>
</html>
The above example outputs:
Add Data by Clicking
chart.events
Add the click method (click event on the entire chart's plotting area) in the chart.event property. This method adds a new data point when a click occurs on the chart's plotting area.
chart: {
events: {
click: function (e) {
// Get the click coordinates and data item
var x = e.xAxis[0].value,
y = e.yAxis[0].value,
series = this.series[0];
// Add the clicked coordinates
series.addPoint([x, y]);
}
}
}
Example
Filename: highcharts_dynamic_click.htm
<html>
<head>
<title>Highcharts Tutorial | tutorialpro.org(tutorialpro.org)</title>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="/try/demo_source/highcharts.js"></script>
</head>
<body>
<div id="container" style="width: 550px; height: 400px; margin: 0 auto"></div>
<script language="JavaScript">
$(document).ready(function() {
var chart = {
type: 'scatter',
margin: [70, 50, 60, 80],
events: {
click: function (e) {
// find the clicked values and the series
var x = e.xAxis[0].value,
y = e.yAxis[0].value,
series = this.series[0];
// Add it
series.addPoint([x, y]);
}
}
};
var title = {
text: 'User supplied data'
};
var subtitle = {
text: 'Click the plot area to add a point. Click a point to remove it.'
};
var xAxis = {
gridLineWidth: 1,
minPadding: 0.2,
maxPadding: 0.2,
maxZoom: 60
};
var yAxis = {
title: {
text: 'Value'
},
minPadding: 0.2,
maxPadding: 0.2,
maxZoom: 60,
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
};
var legend = {
enabled: false
};
var exporting = {
enabled: false
};
var plotOptions = {
series: {
lineWidth: 1,
point: {
events: {
'click': function () {
if (this.series.data.length > 1) {
this.remove();
}
}
}
}
}
};
var series= [{
name: 'Random data',
data: []
}];
var json = {};
json.chart = chart;
json.title = title;
json.subtitle = subtitle;
json.xAxis = xAxis;
json.yAxis = yAxis;
json.legend = legend;
json.exporting = exporting;
json.series = series;
json.plotOptions = plotOptions;
$('#container').highcharts(json);
});
</script>
</body>
</html>
if (this.series.data.length > 1) {
this.remove();
}
var series = [{
data: [[20, 20], [80, 80]]
}];
var json = {};
json.chart = chart;
json.title = title;
json.subtitle = subtitle;
json.xAxis = xAxis;
json.yAxis = yAxis;
json.legend = legend;
json.exporting = exporting;
json.series = series;
json.plotOptions = plotOptions;
$('#container').highcharts(json);
The above example outputs the following result: